<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <form>
      <input
        type="file"
        name="avatar"
        accept="image/*"
        placeholder="请选择头像"
      />
      <button>上传文件</button>
    </form>
    <img src="" alt="" class="avatar" style="width: 500px" />
  </body>
  <script src="./头像/lib/axios.js"></script>
  <script>
    const btn = document.querySelector('button')
    const form = document.querySelector('form')
    const img = document.querySelector('img')
    btn.addEventListener('click',async function (e) {
      e.preventDefault()
      const data = new FormData(form)
      const { data: res } = await axios.post('http://ajax-api.itheima.net/api/file', data)
      img.src=res.data.url
    })
  </script>
</html>
